travis: Full clone for git subtree check
travis: Full clone for git subtree check

Github-Pull: #12388

Tree-SHA512: 8dc7fd5619e60674021ef58f384ddaa2b0d49a88f8babab03697ab19819954f9521de0ede7398661be670ce6339bfea436b10ad916b72f194e18efdb3721c08d

chaincoin/chaincoin,chaincoin/chaincoin,chaincoin/chaincoin,chaincoin/chaincoin,chaincoin/chaincoin,chaincoin/chaincoin